Butterscotch Chip Cookie Cake

Directions

1. 1
   Preheat oven to 350°F. Grease a 9-inch round cake pan and set aside.
2. 2
   In a small bowl, whisk together the flour, salt, cream of tartar and baking soda.
3. 3
   In the bowl of a stand mixer, cream the butter and sugars together until combined and creamy. Add the egg and vanilla and mix for several minutes until light, fluffy and a pale yellow color.
4. 4
   With the mixer on low speed, add the dry ingredients and mix until fully combined. Add in the butterscotch chips.
5. 5
   Turn the dough out into the prepared pan and use an offset spatula to spread into an even layer. Bake in the preheated oven for 20-22 minutes, until the edges are lightly brown and set. Remove from the oven and cool in the pan on a wire rack.
6. 6
   Note: Add in some chocolate chips, white chips, peanut butter chips or caramel bits in place of some of the butterscotch-or make a combination of your favorites!
7. 7
   Adapted from Food.com via Dine and Dish.